Screw/ Worm drive filament extruder Bowden

A 3D printer filament driver for a bowden setup utilizing a wood screw and geared stepper motor. This drive unit is capable of provding significantly higher forces than a traditional filament extruder because of the increased number of engaged teeth and the mechanical advantage of the worm gear/ wood screw. The wood screw is designed to be easily replaceable by unscrewing the tensioner bolt and poping out the screw, then putting the spring on the new screw, compressing the spring and inserting i